Skype has been integrated Successfully with iPhone 4G working on OS 4 Firmware, It’s Real that Skype will run in the background, and display call control outside of the application specially after the Multitasking in the OS 4.
Watch this Video for the Skype Demo on iPhone 4G by David Ponsford:
Also Skype would be integrated directly into the address book, so you can call your contacts directly from the contact book. This Integrations indicates that the Skype App is Really Successful as it just Released the last week to make calls over 3G.
You may want Check our AppStore for iPhone Apps and iPad Apps. Keep updated!!